AN EXPERIMENTAL STUDY ON VORTEX-INDUCED VIBRATION OF CIRCULAR CYLINDER TOWERS AT A HIGH WIND SPEED

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  • Kitagawa Tetsuya
    社団法人 土木学会 東京大学大学院 工学系研究科土木工学専攻
  • Wakahara Toshihiro
    社団法人 土木学会 東京大学大学院 工学系研究科土木工学専攻
  • Fujino Yozo
    社団法人 土木学会 東京大学 工学系研究科土木工学専攻
  • Kimura Kichiro
    社団法人 土木学会 東京大学 工学系研究科土木工学専攻

Bibliographic Information

Other Title
  • 円柱塔状構造物における高風速渦励振の発生メカニズムに関する実験的解明
  • エンチュウトウジョウ コウゾウブツ ニ オケル コウ フウソク カレイシン ノ
  • An experimental study on vortex-induced vibration of a circular cylinder tower at a high wind speed

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Description

A wind tunnel experiment using a SDOF circular cylinder tower model was conducted to study the characteristics of the vortex-induced vibration which occurs at a wind speed higher than the occurrence wind speed of the ordinary vortex-induced vibration. Across-wind model response and the fluctuating wind velocity behind the model at various heights were measured. Wavelet analysis was applied to the data of the fluctuating wind velocity behind the model. The wavelet analysis clarified that the tip-associated vortex is formed rather intermittently around the model top and this causes that vibration. The amplitude of that vibration possesses a slight modulation due to the intermission of the tip-associated vortex.

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